CN114530577A - 钼酸钴/1t相二硫化钼复合锂离子电池负极的制备方法及复合电极材料及锂离子电池 - Google Patents
钼酸钴/1t相二硫化钼复合锂离子电池负极的制备方法及复合电极材料及锂离子电池 Download PDFInfo
- Publication number
- CN114530577A CN114530577A CN202011324101.6A CN202011324101A CN114530577A CN 114530577 A CN114530577 A CN 114530577A CN 202011324101 A CN202011324101 A CN 202011324101A CN 114530577 A CN114530577 A CN 114530577A
- Authority
- CN
- China
- Prior art keywords
- solution
- comoo
- phase
- lithium ion
- ion battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 49
- 229910052982 molybdenum disulfide Inorganic materials 0.000 title claims abstract description 45
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 19
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000007772 electrode material Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- KYYSIVCCYWZZLR-UHFFFAOYSA-N cobalt(2+);dioxido(dioxo)molybdenum Chemical compound [Co+2].[O-][Mo]([O-])(=O)=O KYYSIVCCYWZZLR-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 239000000243 solution Substances 0.000 claims abstract description 42
- 229910052961 molybdenite Inorganic materials 0.000 claims abstract description 32
- 229910018864 CoMoO4 Inorganic materials 0.000 claims abstract description 27
- 239000013078 crystal Substances 0.000 claims abstract description 19
- 239000002070 nanowire Substances 0.000 claims abstract description 19
- 239000002135 nanosheet Substances 0.000 claims abstract description 18
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011259 mixed solution Substances 0.000 claims abstract description 13
- 239000007864 aqueous solution Substances 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000011889 copper foil Substances 0.000 claims abstract description 7
- 239000011734 sodium Substances 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 6
- 239000011230 binding agent Substances 0.000 claims abstract description 6
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 6
- 229910021580 Cobalt(II) chloride Inorganic materials 0.000 claims abstract description 5
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 5
- 239000002055 nanoplate Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 23
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical group CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 235000010413 sodium alginate Nutrition 0.000 claims description 6
- 229940005550 sodium alginate Drugs 0.000 claims description 6
- 239000000661 sodium alginate Substances 0.000 claims description 6
- ZKKLPDLKUGTPME-UHFFFAOYSA-N diazanium;bis(sulfanylidene)molybdenum;sulfanide Chemical compound [NH4+].[NH4+].[SH-].[SH-].S=[Mo]=S ZKKLPDLKUGTPME-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 238000011068 loading method Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 3
- 239000012498 ultrapure water Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 7
- 238000000576 coating method Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 7
- 238000012512 characterization method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000011149 active material Substances 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000004098 selected area electron diffraction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0419—Methods of deposition of the material involving spraying
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1397—Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/523—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron for non-aqueous cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/581—Chalcogenides or intercalation compounds thereof
- H01M4/5815—Sulfides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Nanotechnology (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
本发明公开一种钼酸钴/1T相二硫化钼复合锂离子电池负极的制备方法及复合电极材料及锂离子电池,其中该制备方法包括:提供CoCl2溶液,通过高温水热反应向其中滴加盐酸溶液和钴酸钠溶液,得到CoMoO4纳米线溶液;提供1T相MoS2单晶纳米片,配制包括1T相MoS2单晶纳米片和粘合剂的水性溶液,将该水性溶液刮涂在铜箔上形成导电层;将所述1T相MoS2单晶纳米片和所述CoMoO4纳米线溶液充分混合,并将混合后的溶液喷涂在所述导电层上形成1T相MoS2/CoMoO4复合电极。通过本发明能够得到高容量且长循环寿命的电池电极材料。
Description
技术领域
本发明涉及电化学电源技术领域,尤其涉及一种钼酸钴/1T相二硫化钼复合锂离子电池负极的制备方法及复合电极材料及锂离子电池。
背景技术
目前,高性能锂离子电池的需求不断增长。在这种情况下,大量的研究着力于开发具有更高能量和功率密度以及更长循环寿命的电极。电池的电化学性能是由活性材料的基本性能和微观结构共同控制的。由于活性材料的微观结构对性能(如速率容量)起着非常重要的作用,微观结构优化几乎总是与新材料开发同时进行。因此,研制一种采用新材料技术制作的高容量、长循环寿命的电池电极材料成为亟待解决的问题。
发明内容
本发明的主要目的在于提供一种钼酸钴/1T相二硫化钼复合锂离子电池负极的制备方法及复合电极材料及锂离子电池,以解决现有技术存在的缺少具有高容量且长循环寿命的电池电极材料的技术问题。
根据本发明实施例的一个方面提出一种钼酸钴/1T相二硫化钼复合锂离子电池负极的制备方法,其包括:提供CoCl2溶液,向其中滴加盐酸溶液和钴酸钠溶液,通过高温水热反应得到CoMoO4纳米线溶液;提供1T相MoS2单晶纳米片,配制包括1T相MoS2单晶纳米片和粘合剂的水性溶液,将该水性溶液刮涂在铜箔上形成导电层;将所述1T相MoS2单晶纳米片和所述 CoMoO4纳米线溶液充分混合,并将混合后的溶液喷涂在所述导电层上形成 1T相MoS2/CoMoO4复合电极。
其中,所述方法还包括:按照摩尔比为1:1的比例将四硫代钼酸铵溶液和氢氧化锂溶液进行混合得到混合溶液;煅烧所述混合溶液合成所述1T相MoS2单晶纳米片,其中煅烧环境为氩气、氮气、或氮气和氢气的混合气体环境。
其中,所述方法还包括:在制备CoMoO4纳米线溶液时,将CoCl2溶解在超纯水中并进行搅拌,在CoCl2溶液中滴加0.5mL盐酸溶液和30mL钴酸钠水溶液。
其中,所述方法还包括:将CoMoO4纳米线溶液放入内衬聚四氟乙烯的不锈钢高压釜中进行加热,其中,加热温度为120℃,加热时间为12小时;加热之后在80℃真空中干燥10小时。
其中,其中所述粘合剂为藻酸钠,所述方法还包括:配制包括50%w/w 藻酸钠和50%w/w 1T相MoS2的水性溶液。
其中,所述方法还包括:制备所述导电层后,将其在真空环境下于80℃干燥2h。
其中,所述方法还包括:所述复合电极的厚度为120μm,其中,1T相 MoS2/CoMoO4复合材料的总平均负载质量为2.0mg。
其中,所述方法还包括:将复合电极在真空下进行干燥,其中,干燥温度为80-120℃。
根据本发明实施例的另一个方面还提供一种通过以上所述制备方法制得的复合电极材料。
根据本发明实施例的再一个方面还提供一种锂离子电池,其包括以上所述的复合电极。
本发明通过由1T相MoS2单晶纳米片和CoMoO4纳米线两种材料采用刮涂和喷涂工艺进行复合,形成一个两层的复合电极,该电极材料可具有以下优点:层状结构复合电极材料提供了大量的活性位点,增大了其活性表面积;并且,CoMoO4纳米线和1T相MoS2纳米片围聚在一起,形成多级孔道,有利于电解液离子的迁移和扩散,有效提高了活性物质的利用率,从而获得更高的比电容。
附图说明
此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:
图1是根据本发明实施例的钼酸钴/1T相二硫化钼复合锂离子电池负极的制备方法的流程图;
图2是根据本发明实施例的形成1T MoS2/CoMoO4复合电极的原理示意图;
图3A是根据本发明实施例的CoMoO4纳米线的扫描电镜图;
图3B是根据本发明实施例的1T相MoS2纳米片的扫描电镜图;
图3C是根据本发明实施例的1T相MoS2的透射电镜图;
图3D是根据本发明实施例的1T相MoS2的选区电子衍射图;
图4A是根据本发明实施例的CoMoO4的Co元素XPS表征示意图;
图4B是根据本发明实施例的CoMoO4的Mo元素XPS表征示意图;
图4C是根据本发明实施例的CoMoO4的O元素XPS表征示意图;
图4D是根据本发明实施例的CoMoO4的全谱分析XPS表征示意图;
图5是根据本发明实施例的复合阴极的比容量和库仑效率曲线的示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚,下面将结合本发明具体实施例及相应的附图对本发明技术方案进行清楚、完整地描述。显然,所描述的实施例仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
以下结合附图,详细说明本发明各实施例提供的技术方案。
根据本发明实施例提供了一种钼酸钴/1T相二硫化钼复合锂离子电池负极的制备方法,如图1所示,该方法包括以下步骤:
步骤S102,提供氯化钴(CoCl2)溶液,向其中滴加盐酸溶液和钴酸钠溶液,通过高温水热反应得到CoMoO4(钼酸钴)纳米线溶液。
具体地,可将0.75g CoCl2溶解在30mL超纯水中(电阻率为18.2MΩcm),然后在室温下在磁力搅拌器中将溶液转移至50mL烘焙机中,并搅拌2h。然后,滴加0.5mL HCl溶液和30mL Na2CoO4·2H2O水溶液(0.80g)并搅拌2 h。
然后,将CoMoO4纳米线溶液放入内衬聚四氟乙烯的不锈钢高压釜中,将其加热至120℃并保持12小时。完成该过程后,取出容器,将样品过滤,最后在80℃的真空下干燥10小时。
步骤S104,提供1T相MoS2(二硫化钼)单晶纳米片,配制包括藻酸钠和1T相MoS2单晶纳米片的水性溶液,将该水性溶液刮涂在铜箔上形成导电层。
可预先制备1T相MoS2单晶纳米片,具体可按照摩尔比为1:1的比例将四硫代钼酸铵溶液和氢氧化锂溶液进行混合得到混合溶液,然后通过在氩气、氮气、或氮气和氢气的环境下煅烧四硫代钼酸铵和氢氧化锂的混合溶液来合成1T相MoS2单晶纳米片。
接着,制备由50%w/w藻酸钠和50%w/w 1T相MoS2组成的水性溶液,然后将该溶液刮涂在预清洁的铜箔上以形成40μm的导电层。
步骤S106,将所述1T相MoS2单晶纳米片和所述CoMoO4纳米线溶液充分混合,并将混合后的溶液喷涂在所述导电层上形成复合电极。
将步骤S104制得的样品在真空下于80℃干燥2h,然后将37.5%w/w 1T 相MoS2和62.5%w/w CoMoO4充分混合的溶液喷涂在导电层上,形成120μm 厚度的复合电极,将复合电极在真空下于120℃干燥6h。其中1T相 MoS2/CoMoO4复合材料的总平均负载质量为2.0mg。在本发明的一些实施例中,所形成的导电层的厚度可以是60μm,复合电极的厚度可以是60μm;在本发明的另一些实施例中,所形成的导电层的厚度可以是80μm,复合电极的厚度可以是40μm。
在本发明的一些实施例中,可由50%w/w 1T相MoS2和50%w/w CoMoO4充分混合。
结合参考图2,根据本发明实施例还提供一种通过上述制备方法制得的复合电极材料,其中该复合电极包括底层和顶层的两层复合电极。具体地,准备好清洁的铜箔,使用刮刀将包含1T MoS2和粘合剂的溶液刮涂在铜箔上形成底层。干燥后,通过喷枪在底层上喷淋1T相MoS2单晶纳米片和CoMoO4纳米线混合溶液,形成1T相MoS2/CoMoO4复合电极。
根据本发明实施例还提供一种包括上述的1T相MoS2/CoMoO4复合电极的锂离子电池,其中该1T相MoS2/CoMoO4复合电极作为锂离子电池的负极。
结合参考图3至图4,其中图3A至3D示出根据本发明实施例所制备的复合材料的微观形貌图,图4A至4D示出了CoMoO4的XPS表征。由于1T 相MoS2具有较快的电荷注入或电荷转移,因此其催化活性更高,此外由于 1T相MoS2基底表面和边缘的活性位点增加,展现出卓越的析氢反应性能。 CoMoO4具有成本低、无毒的优点,并表现出较高的电化学性能,其理论比容量可高达980mAh/g,被认为是最具竞争力的下一代负极候选材料之一。
图5为钼酸钴/1T相二硫化钼负极从0到150循环,在0.5C下从0.01v 循环到3v时,比容量和库仑效率曲线的示意图。本发明实施例首先通过在氩气环境下煅烧四硫代钼酸铵和氢氧化锂的混合溶液来合成1T相MoS2单晶纳米片。然后,通过水热反应法制备出CoMoO4纳米线。随后,随后通过刮涂喷涂的方法,制备出1T相MoS2/CoMoO4复合电极。通过测试该复合电极的可以看出,初始的充电量为843.7mAhg-1,放电容量是1099.9mAhg-1,库伦效率是76.7%。经过3次循环之后,库伦效率达到了94%。经过150圈的循环过程,充放电容量分别是为695.2mAhg-1和692.6mAhg-1。循环45次以后,库伦效率均保持在了98%以上。这说明该电极其具有稳定的循环寿命。图5中从上之下的线段依次表示钼酸钴/1T相二硫化钼的库伦效率 (Coulombic Efficiency)、钼酸钴/1T相二硫化钼的放电和充电的比容量 (Specificcapacity)。
基于以上结果可知本发明具有以下优点:
(1)层状结构复合电极材料提供了大量的活性位点,增大了其活性表面积;
(2)CoMoO4纳米线和1T相MoS2纳米片围聚在一起,形成多级孔道,有利于电解液离子的迁移和扩散,有效提高了活性物质的利用率,从而获得更高的比电容。
本领域技术人员应明白,本发明的实施例可提供为方法、系统或计算机程序产品。因此,本发明可采用完全硬件实施例、完全软件实施例或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
以上所述仅为本发明的实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的权利要求范围之内。
Claims (10)
1.一种钼酸钴/1T相二硫化钼复合锂离子电池负极的制备方法,其特征在于,包括:
提供CoCl2溶液,向其中滴加盐酸溶液和钴酸钠溶液,通过高温水热反应得到CoMoO4纳米线溶液;
提供1T相MoS2单晶纳米片,配制包括1T相MoS2单晶纳米片和粘合剂的水性溶液,将该水性溶液刮涂在铜箔上形成导电层;
将所述1T相MoS2单晶纳米片和所述CoMoO4纳米线溶液充分混合,并将混合后的溶液喷涂在所述导电层上形成1T相MoS2/CoMoO4复合电极。
2.根据权利要求1所述的方法,其特征在于,还包括:
按照摩尔比为1:1的比例将四硫代钼酸铵溶液和氢氧化锂溶液进行混合得到混合溶液;
煅烧所述混合溶液合成所述1T相MoS2单晶纳米片,其中煅烧环境为氩气、氮气、或氮气和氢气的混合气体环境。
3.根据权利要求1所述的方法,其特征在于,还包括:
在制备CoMoO4纳米线溶液时,将CoCl2溶解在超纯水中并进行搅拌,在CoCl2溶液中滴加0.5mL盐酸溶液和30mL钴酸钠水溶液。
4.根据权利要求3所述的方法,其特征在于,还包括:
将CoMoO4纳米线溶液放入内衬聚四氟乙烯的不锈钢高压釜中进行加热,其中,加热温度为120℃,加热时间为12小时;加热之后在80℃真空中干燥10小时。
5.根据权利要求1所述的方法,其特征在于,其中所述粘合剂为藻酸钠,所述方法还包括:
配制包括50%w/w藻酸钠和50%w/w 1T相MoS2的水性溶液。
6.根据权利要求5所述的方法,其特征在于,还包括:
制备所述导电层后,将其在真空环境下于80℃干燥2h。
7.根据权利要求1所述的方法,其特征在于,还包括:
所述复合电极的厚度为120μm,其中,1T相MoS2/CoMoO4复合材料的总平均负载质量为2.0mg。
8.根据权利要求7所述的方法,其特征在于,还包括:
将复合电极在真空下进行干燥,其中,干燥温度为80-120℃。
9.一种复合电极材料,其特征在于,所述复合电极材料通过权利要求1-8中任一项制备方法制得。
10.一种锂离子电池,其特征在于,包括权利要求9所述的复合电极。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011324101.6A CN114530577A (zh) | 2020-11-23 | 2020-11-23 | 钼酸钴/1t相二硫化钼复合锂离子电池负极的制备方法及复合电极材料及锂离子电池 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011324101.6A CN114530577A (zh) | 2020-11-23 | 2020-11-23 | 钼酸钴/1t相二硫化钼复合锂离子电池负极的制备方法及复合电极材料及锂离子电池 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN114530577A true CN114530577A (zh) | 2022-05-24 |
Family
ID=81619819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202011324101.6A Pending CN114530577A (zh) | 2020-11-23 | 2020-11-23 | 钼酸钴/1t相二硫化钼复合锂离子电池负极的制备方法及复合电极材料及锂离子电池 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114530577A (zh) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103050667A (zh) * | 2012-12-13 | 2013-04-17 | 中南大学 | 一种用于锂硫二次电池的多层次结构复合正极及制备方法 |
US20140272583A1 (en) * | 2013-03-15 | 2014-09-18 | Ppg Industries Ohio, Inc. | Pretreatment compositions and methods for coating a battery electrode |
RU2570070C1 (ru) * | 2014-07-29 | 2015-12-10 | Анна Владимировна Храменкова | Способ получения композиционного электродного материала на основе кобальт ванадиевого оксида и оксидных соединений молибдена |
CN108336335A (zh) * | 2018-02-05 | 2018-07-27 | 福州大学 | 一种用作锂离子电池负极材料的钼酸钴/二硫化钼复合材料及其制备 |
CN109950503A (zh) * | 2019-04-02 | 2019-06-28 | 吉林大学 | 一种CoMoOx/碳/硫复合纳米材料的制备方法、锂离子电池负极及锂离子半电池 |
-
2020
- 2020-11-23 CN CN202011324101.6A patent/CN114530577A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103050667A (zh) * | 2012-12-13 | 2013-04-17 | 中南大学 | 一种用于锂硫二次电池的多层次结构复合正极及制备方法 |
US20140272583A1 (en) * | 2013-03-15 | 2014-09-18 | Ppg Industries Ohio, Inc. | Pretreatment compositions and methods for coating a battery electrode |
RU2570070C1 (ru) * | 2014-07-29 | 2015-12-10 | Анна Владимировна Храменкова | Способ получения композиционного электродного материала на основе кобальт ванадиевого оксида и оксидных соединений молибдена |
CN108336335A (zh) * | 2018-02-05 | 2018-07-27 | 福州大学 | 一种用作锂离子电池负极材料的钼酸钴/二硫化钼复合材料及其制备 |
CN109950503A (zh) * | 2019-04-02 | 2019-06-28 | 吉林大学 | 一种CoMoOx/碳/硫复合纳米材料的制备方法、锂离子电池负极及锂离子半电池 |
Non-Patent Citations (2)
Title |
---|
KYUNG-SOO PARK等: "Electrochemical performance of NixCo1-xMoO4(0≤x≤1) nanowire anodes for lithium-ion batteries" * |
ZHAO LI等: "Carbon-Free, High-Capacity and Long Cycle Life 1D-2D NiMoO4 Nanowires/Metallic 1T MoS2 Composite Lithium-Ion Battery Anodes" * |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107359320B (zh) | 一种氮掺杂多孔碳/MoS2钠离子电池负极材料及制备方法 | |
CN107732248B (zh) | 锂离子电池负极的mof材料及其应用 | |
CN105914374B (zh) | 氮掺杂碳包覆硒化钼/石墨烯核壳阵列夹心结构的复合材料及其制备方法和应用 | |
CN105720251A (zh) | 一种钠离子电池硫化锑基复合材料及其制备方法 | |
CN106252663B (zh) | 金属有机骨架材料CuBDC纳米片及其制备方法和应用 | |
CN110428976B (zh) | 一种Cu-Co-S-MOF纳米片的制备方法及其应用 | |
CN112018344B (zh) | 碳包覆硫化镍电极材料及其制备方法和应用 | |
CN113249751B (zh) | 一种二维碳化钛支撑的稳定双相二硒化钼复合材料及制备方法和应用 | |
CN110010895A (zh) | 碳纤维负载氧化镁颗粒交联纳米片阵列复合材料及其制备方法和应用 | |
CN105938905B (zh) | 一种富氮掺杂改性多孔碳材料的制备方法 | |
CN108492996A (zh) | 一种氟、氮共掺杂的类石墨烯片层材料的制备方法 | |
CN110970226A (zh) | 一种复合电极材料及制备方法、超级电容器 | |
CN112582609A (zh) | 一种钠离子电池负极材料的制备方法 | |
CN109904391A (zh) | 一种锂金属电池锂负极的改性方法及锂金属电池 | |
CN109301186A (zh) | 一种包覆型多孔结构的三元正极材料及其制备方法 | |
CN103400980A (zh) | 三氧化二铁/氧化镍核壳纳米棒阵列薄膜及其制备方法和应用 | |
CN106450235B (zh) | 一种自组装纳米片状多孔结构四氧化三钴-氧化锌复合材料的制备方法及其应用 | |
Zhang et al. | 3D porous ZnCo 2 O 4@ NiO on nickel foam as advanced electrodes for lithium storage | |
CN110415993B (zh) | 一种Mn-Co-S/Co-MOF纳米材料的制备方法及其应用 | |
CN110197902B (zh) | 一种多孔结构开口核桃壳状钠离子电池正极材料及其制备方法 | |
CN115050920B (zh) | 一种锑基一体化电极及其制备方法和应用 | |
CN110247041A (zh) | 一种ZnNiO/C复合纳米材料及其制备方法 | |
CN114583126B (zh) | 一种La2O3-Co/AB复合材料及其制备方法及应用 | |
CN114300276B (zh) | 一种Ni-Fe-S@NiCo2O4@NF复合材料及其制备方法与应用 | |
CN114530577A (zh) | 钼酸钴/1t相二硫化钼复合锂离子电池负极的制备方法及复合电极材料及锂离子电池 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220524 |
|
WD01 | Invention patent application deemed withdrawn after publication |